Merge Tags are data fields that can be collected through DojoMojo and sent to your ESP through your integration to help you segment your list, personalize your sends, and optimize your email marketing.
In order to set up merge tags, you'll need to integrate with Salesforce. Click here to learn how to if you haven't already.
To set up merge tags, first navigate to your account in Salesforce. Then follow these steps:
1) From the management settings for the object you want to add a field to, go to Fields.
2) Click New.
3) Choose the type of field and click Next.
4) Complete the field setup, and click Save.
5) In DojoMojo, in the merge tag settings, for Value in Salesforce enter the fields API Name, including __c if applicable, from Salesforce.
For more information about custom fields in Salesforce, visit their help article here.